diff options
Diffstat (limited to 'target/linux/ar7-2.6/files/arch/mips/ar7/irq.c')
| -rw-r--r-- | target/linux/ar7-2.6/files/arch/mips/ar7/irq.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/target/linux/ar7-2.6/files/arch/mips/ar7/irq.c b/target/linux/ar7-2.6/files/arch/mips/ar7/irq.c deleted file mode 100644 index 1a09aedc1..000000000 --- a/target/linux/ar7-2.6/files/arch/mips/ar7/irq.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * $Id$ - * - * Copyright (C) 2006, 2007 OpenWrt.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> - -#include <asm/irq.h> -#include <asm/irq_cpu.h> -#include <asm/mipsregs.h> -#include <asm/ar7/ar7.h> - -#define EXCEPT_OFFSET 0x80 -#define PACE_OFFSET 0xA0 -#define CHNLS_OFFSET 0x200 - -#define REG_OFFSET(irq, reg) ((irq) / 32 * 0x4 + reg * 0x10) -#define SEC_REG_OFFSET(reg) (EXCEPT_OFFSET + reg * 0x8) -#define SEC_SR_OFFSET (SEC_REG_OFFSET(0)) /* 0x80 */ -#define CR_OFFSET(irq) (REG_OFFSET(irq, 1)) /* 0x10 */ -#define SEC_CR_OFFSET (SEC_REG_OFFSET(1)) /* 0x88 */ -#define ESR_OFFSET(irq) (REG_OFFSET(irq, 2)) /* 0x20 */ -#define SEC_ESR_OFFSET (SEC_REG_OFFSET(2)) /* 0x90 */ -#define ECR_OFFSET(irq) (REG_OFFSET(irq, 3)) /* 0x30 */ -#define SEC_ECR_OFFSET (SEC_REG_OFFSET(3)) /* 0x98 */ -#define PIR_OFFSET (0x40) -#define MSR_OFFSET (0x44) -#define PM_OFFSET(irq) (REG_OFFSET(irq, 5)) /* 0x50 */ -#define TM_OFFSET(irq) (REG_OFFSET(irq, 6)) /* 0x60 */ - -#define REG(addr) (*(volatile u32 *)(KSEG1ADDR(AR7_REGS_IRQ) + addr)) - -#define CHNL_OFFSET(chnl) (CHNLS_OFFSET + (chnl * 4)) - -static void ar7_unmask_irq(unsigned int irq_nr); -static void ar7_mask_irq(unsigned int irq_nr); -static void ar7_unmask_secondary_irq(unsigned int irq_nr); -static void ar7_mask_secondary_irq(unsigned int irq_nr); -static irqreturn_t ar7_cascade(int interrupt, void *dev); -static irqreturn_t ar7_secondary_cascade(int interrupt, void *dev); -static void ar7_irq_init(int base); -static int ar7_irq_base; - -static struct irq_chip ar7_irq_type = { - .typename = "AR7", - .name = "AR7", - .unmask = ar7_unmask_irq, - .mask = ar7_mask_irq, -}; - -static struct irq_chip ar7_secondary_irq_type = { - .name = "AR7", - .unmask = ar7_unmask_secondary_irq, - .mask = ar7_mask_secondary_irq, -}; - -static struct irqaction ar7_cascade_action = { - .handler = ar7_cascade, - .name = "AR7 cascade interrupt" -}; - -static struct irqaction ar7_secondary_cascade_action = { - .handler = ar7_secondary_cascade, - .name = "AR7 secondary cascade interrupt" -}; - -static void ar7_unmask_irq(unsigned int irq) -{ - unsigned long flags; - local_irq_save(flags); - /* enable the interrupt channel bit */ - REG(ESR_OFFSET(irq)) = 1 << ((irq - ar7_irq_base) % 32); - local_irq_restore(flags); -} - -static void ar7_mask_irq(unsigned int irq) -{ - unsigned long flags; - local_irq_save(flags); - /* disable the interrupt channel bit */ - REG(ECR_OFFSET(irq)) = 1 << ((irq - ar7_irq_base) % 32); - local_irq_restore(flags); -} - -static void ar7_unmask_secondary_irq(unsigned int irq) -{ - unsigned long flags; - local_irq_save(flags); - /* enable the interrupt channel bit */ - REG(SEC_ESR_OFFSET) = 1 << (irq - ar7_irq_base - 40); - local_irq_restore(flags); -} - -static void ar7_mask_secondary_irq(unsigned int irq) -{ - unsigned long flags; - local_irq_save(flags); - /* disable the interrupt channel bit */ - REG(SEC_ECR_OFFSET) = 1 << (irq - ar7_irq_base - 40); - local_irq_restore(flags); -} - -void __init arch_init_irq(void) { - mips_cpu_irq_init(); - ar7_irq_init(8); -} - -static void __init ar7_irq_init(int base) -{ - int i; - /* - Disable interrupts and clear pending - */ - REG(ECR_OFFSET(0)) = 0xffffffff; - REG(ECR_OFFSET(32)) = 0xff; - REG(SEC_ECR_OFFSET) = 0xffffffff; - REG(CR_OFFSET(0)) = 0xffffffff; - REG(CR_OFFSET(32)) = 0xff; - REG(SEC_CR_OFFSET) = 0xffffffff; - - ar7_irq_base = base; - - for(i = 0; i < 40; i++) { - REG(CHNL_OFFSET(i)) = i; - /* Primary IRQ's */ - irq_desc[i + base].status = IRQ_DISABLED; - irq_desc[i + base].action = NULL; - irq_desc[i + base].depth = 1; - irq_desc[i + base].chip = &ar7_irq_type; - /* Secondary IRQ's */ - if (i < 32) { - irq_desc[i + base + 40].status = IRQ_DISABLED; - irq_desc[i + base + 40].action = NULL; - irq_desc[i + base + 40].depth = 1; - irq_desc[i + base + 40].chip = &ar7_secondary_irq_type; - } - } - - setup_irq(2, &ar7_cascade_action); - setup_irq(ar7_irq_base, &ar7_secondary_cascade_action); - set_c0_status(IE_IRQ0); -} - -static irqreturn_t ar7_cascade(int interrupt, void *dev) -{ - int irq; - - irq = (REG(PIR_OFFSET) & 0x3F); - REG(CR_OFFSET(irq)) = 1 << (irq % 32); - - do_IRQ(irq + ar7_irq_base); - - return IRQ_HANDLED; -} - -static irqreturn_t ar7_secondary_cascade(int interrupt, void *dev) -{ - int irq = 0, i; - unsigned long status; - - status = REG(SEC_SR_OFFSET); - if (unlikely(!status)) { - spurious_interrupt(); - return IRQ_NONE; - } - - for (i = 0; i < 32; i++) - if (status & (i << 1)) { - irq = i + 40; - REG(SEC_CR_OFFSET) = 1 << i; - break; - } - - do_IRQ(irq + ar7_irq_base); - - return IRQ_HANDLED; -} - -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_status() & read_c0_cause(); - if (pending & STATUSF_IP7) /* cpu timer */ - do_IRQ(7); - else if (pending & STATUSF_IP2) /* int0 hardware line */ - do_IRQ(2); - else - spurious_interrupt(); -} |